Consolidated Statements of Cash Flows (Parenthetical) (USD $)	12 Months Ended
	Dec. 31, 2011	Jan. 01, 2011	Jan. 02, 2010	Dec. 29, 2007 Subsidiary Land [Member]
Property, Plant and Equipment [Line Items]
Cash received from investments	$ 41,722,000	$ 45,891,000	$ 159,564,000	$ 30,500,000
Note receivable				9,800,000
Sale of investments				40,300,000
Supplemental Cash Flow Information [Abstract]
Capital expenditures payable at year-end included into accounts payable	12,300,000	18,300,000	6,100,000
Provisional payments to EC on changes in operating assets			10,000,000
Income tax payments, net of refunds	50,800,000	26,400,000	20,900,000
Interest payments on borrowing	139,900,000	157,200,000	184,700,000
Cash received from asset sales			159,500,000
Long term debt assumed			25,900,000
Total benefit from asset sale			$ 185,400,000